In fractional distillation,which fraction leaves the tower at very top?
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Answer:
butane and propane at top
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Answer: Butane and propane (highly volatile gases) Leave the tower at very top.
Explanation:
- Fractional distillation is the process of separating crude oil into different hydrocarbon products which are useful in different ways.
- The fraction present at the top is the most volatile gas and is also lightweight like butane and propane.
- As the crude oil rises above the temperature falls down facilitating the condensation of gases.
- In the case of heavier gases, they have to further undergo vacuum or steam distillation.
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